Screen printing device for manufacturing flexible sensor

Abstract

A silk-screen printing device for manufacturing a flexible sensor comprises a printing table, a silk screen and a scraper. The printing table comprises a low end, a high end, a right side plate and a left side plate, a right silk screen hole and a right material hole are formed in the right side plate, a left silk screen hole and a left material hole are formed in the left side plate, a silk screen groove is formed between the left silk screen hole and the right silk screen hole, a silk screen is inserted into the silk screen groove, and the top of the silk screen is connected with the scraper. And the slurry is tightly accumulated at the bottom of the scraper under the action of gravity and falls down along the silk screen under the action of gravity, so that the slurry can be uniformly distributed on the flexible material, the uniform slurry can generate a uniform conductive layer, and the silk-screen printing effect is relatively good. Therefore, according to the design, the slurry can be evenly distributed on the flexible material, and the screen printing effect is good.

Description

Technical Field

[0001] The invention relates to a screen printing device, belongs to the field of smart wearable fabrics, and in particular to a screen printing device for making flexible sensors. Background Art

[0002] Smart wearable devices are computing devices that can be installed on people, animals and objects, and can sense, transmit and process information. Flexible sensors are the core components of smart wearable devices. When in use, the flexible sensor is attached to fabric or human skin. When deformed by external forces or driven by itself, the flexible sensor converts the deformation information into electronic information for transmission. Existing flexible sensors generally include a base layer, a conductive layer, a sensing layer or a sensitive layer. The conductive layer is generally made by printing a conductive paste on the base layer using a screen printing method.

[0003] The Chinese patent application number is 201510570520.0 and the application date is September 9, 2015. It discloses an environmentally friendly wearable paper-based strain sensor and a preparation method thereof. The strain sensor includes a flexible substrate, a flexible sensing film disposed on the flexible substrate, and conductors disposed at both ends of the flexible conductor for conducting electricity. The flexible substrate includes flexible paper, and the flexible sensing film is a mixture of graphite powder and methyl cellulose. Although the design realizes the preparation of the flexible sensor by screen printing, it still has the following defects: In this design, during screen printing, the scraper scrapes the slurry in the horizontal direction. At this time, under the action of the gravity of the slurry, more slurry accumulates in some areas of the screen, while less slurry accumulates in some areas, which will cause the slurry to be unevenly distributed on the flexible material, thereby reducing the effect of screen printing.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the application, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to ordinary technicians in this field. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects and problems existing in the prior art that slurry is unevenly distributed on a flexible material, and to provide a screen printing device for manufacturing a flexible sensor with slurry evenly distributed on a flexible material.

[0006] To achieve the above objectives, the technical solution of the present invention is: A screen printing device for making a flexible sensor, the device comprising a printing table, a screen and a scraper; The printing table comprises a low end and a high end, the highest height of the high end is higher than the highest height of the low end, one side of the high end is connected to one side of the low end through a right side plate, a right screen hole and a right material hole are arranged on the right side plate in a direction from the top of the low end to the top of the high end, and the right screen hole is located above the right material hole; the other side of the high end is connected to the other side of the low end through a left side plate, a left screen hole and a left material hole are arranged on the left side plate in a direction from the top of the low end to the top of the high end, and the left screen hole is located above the left material hole; The left end of the wire mesh is inserted into the left wire mesh hole, the right end of the wire mesh is inserted into the right wire mesh hole, and one end of the wire mesh away from the left material hole and the right material hole is connected to the bottom of the scraper.

[0007] The angle between the left wire mesh hole and the horizontal line is an acute angle, and the angle between the right wire mesh hole and the horizontal line is an acute angle.

[0008] The wire mesh comprises a plurality of wire mesh holes, and the inner walls of the wire mesh holes are wire mesh walls.

[0009] A mesh cavity is formed between the left mesh hole and the right mesh hole, a mesh top wall is provided on the side of the mesh cavity close to the high end, one end of the mesh top wall is vertically connected to one end of the mesh upper wall; a mesh bottom wall is provided on the side of the mesh cavity close to the low end, the mesh bottom wall is vertically connected to one end of the mesh lower wall; There is a material groove between the left material hole and the right material hole, and the material groove includes a material top wall, a material side wall and a material bottom wall which are vertically connected in sequence. One end of the material top wall is vertically connected to one end of the upper side wall of the wire mesh, and one end of the material bottom wall is vertically connected to one end of the lower side wall of the wire mesh.

[0010] The lower end is provided with a front opening, and the front opening is provided with a front cover plate, and the movement stroke of the front cover plate is moving to be connected with the front opening and moving away from the front opening.

[0011] A low-end plate is disposed on the top of the low end, and a low-end hole is disposed on the low-end plate; The front cover plate is vertically connected to a front vertical plate at one end on the front side of the lower end plate, and one end of a front connecting strip is vertically connected to the front vertical plate. The middle portion of the front connecting strip is inserted into the lower end hole, and the other end of the front connecting strip extends away from the lower end plate.

[0012] A front spring is sleeved on one end of the front connecting strip located between the lower end plate and the front vertical plate; One end of the front connecting strip away from the lower end plate is vertically connected to the middle part of the front blocking block.

[0013] The high end is provided with a rear opening, and the rear opening is provided with a rear cover plate, and the movement stroke of the rear cover plate is moving to be connected with the rear opening and moving away from the rear opening.

[0014] A high-end plate is disposed on the top of the high end, and a high-end hole is disposed on the high-end plate; One end of the rear cover plate located at the rear side of the high-end plate is vertically connected to the rear vertical plate, one end of the rear connecting strip is vertically connected to the rear vertical plate, the middle part of the rear connecting strip is inserted into the high-end hole, and the other end of the rear connecting strip extends away from the high-end plate; One end of the rear connecting strip away from the high-end plate is vertically connected to the middle part of the rear blocking block; A rear spring is sleeved on one end of the rear connecting strip located between the high end plate and the rear vertical plate.

[0015] The scraper includes a left movable shaft and a right movable shaft; The left side plate is provided with a left partition, the upper part of the left partition is an upper left channel, the lower part of the left partition is a lower left channel, and the movement stroke of the left movable shaft is to move along the upper left channel and the lower left channel; The right side plate is provided with a right partition, the upper part of the right partition is an upper right channel, the lower part of the right partition is a lower right channel, and the movement stroke of the right movable shaft is moving along the upper right channel and the lower right channel.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In a screen printing device for making a flexible sensor of the present invention, the device comprises a printing table, a screen and a scraper. The printing table comprises a low end, a high end, a left plate and a right plate, the high end is higher than the low end, a left screen hole and a left material hole are arranged on the left plate, a right screen hole and a right material hole are arranged on the right plate, a material slot is formed between the right material hole and the left material hole, a screen is inserted into the right screen hole and the left screen hole, and the screen is connected to the scraper. When used, a printing plate is first inserted into the material slot, and then a flexible material is placed on the top of the printing plate, and then the slurry is placed on the outside of the scraper, and then the scraper is pushed from bottom to top along the screen. At this time, the scraper pushes the accumulated slurry to gradually rise along the screen, and the slurry close to the screen falls along the screen onto the flexible material. The advantages of the present invention also include: First point: the screen gradually rises from front to back, so the scraper gradually pushes the slurry upward. At this time, the slurry is tightly accumulated at the bottom of the scraper under the action of gravity. Therefore, if there is enough slurry at the bottom of the scraper, the slurry falling into the unit area of ​​the flexible material is sufficient, which is helpful for the subsequent formation of a tight conductive film, and the screen printing effect is better; Second point: The conductive effect of the solid conductive film is uniform, and the strength of the solid conductive film is good, which helps to improve the sensing effect of the flexible sensor; Therefore, the present invention can make the slurry evenly distributed on the flexible material and achieve a better screen printing effect.

[0017] 2. In a screen printing device for making a flexible sensor of the present invention, the screen includes a plurality of screen holes, the inner wall of the screen hole is a screen wall; a screen cavity is formed between the left screen hole and the right screen hole, the top of the screen cavity includes a screen top wall and a screen upper side wall, the bottom of the screen cavity includes a screen bottom wall and a screen lower side wall, a material groove is formed between the left material hole and the right material hole, the material groove includes a material top wall, a material side wall and a material bottom wall, the material top wall is connected to the screen upper side wall, and the material bottom wall is connected to the screen lower side wall. When used, The top of the screen is connected to the top wall and the upper side wall of the screen, and the bottom of the screen is connected to the bottom wall and the lower side wall of the screen, so that the screen has a tendency to gradually rise from front to back, and the screen as a whole is located in an inclined plane without protruding or concave places, which is convenient for the scraper to push the slurry upward along the screen, so it is easy to operate; the printing plate is connected to the side wall of the material, so that the flexible material on the printing plate is parallel to the screen, and the slurry falls from the screen holes to the flexible material. In this process, the screen wall guides the slurry to the flexible material. Therefore, the present invention is easy to operate.

[0018] 3. In a screen printing device for making a flexible sensor of the present invention, the lower end is provided with a front opening, a front cover is provided on the front opening, the front cover is connected to the front vertical plate, a front spring is provided on one side of the front connecting strip on the front vertical plate, and a front blocking block is provided on the other side. When in use, when the scraper is against the front blocking block, the front blocking block is moved forward, and then the front blocking block drives the front connecting strip, the front vertical plate, and the front cover plate to move in sequence, so the front cover plate is away from the front opening, and the slurry in the front opening overflows, thereby realizing the automatic feeding function; after the scraper is away from the front blocking block, the front spring releases the elastic force to move the front vertical plate backward, so the front cover plate moves to cover the front opening to seal the front opening and prevent the slurry in the front opening from failing. Therefore, the present invention has an automatic feeding function.

[0019] 4. In a screen printing device for making a flexible sensor of the present invention, the high end is provided with a rear opening, the rear opening is provided with a rear cover plate, the rear cover plate is connected to the rear vertical plate, one side of the rear connecting strip on the rear plate is provided with a rear spring, and the other side is provided with a rear blocking block. When in use, when the scraper is against the rear blocking block, the rear blocking block is moved backward, and then the rear connecting strip, the rear vertical plate, and the rear cover plate are driven to move in sequence by the rear blocking block, so that the rear cover plate is away from the rear opening, and then the scraper pushes the excess slurry into the rear opening to recover the excess slurry; after the scraper is away from the rear blocking block, the rear spring releases the elastic force to move the rear vertical plate forward, so that the rear cover plate moves to cover the rear opening to seal the rear opening and prevent the slurry in the rear opening from failing. Therefore, the present invention has an automatic recovery function.

[0020] 5. In a screen printing device for making a flexible sensor of the present invention, the left side plate includes an upper left channel and a lower left channel, and the right side plate includes an upper right channel and a lower right channel. When in use, the scraper rises to the high end along the lower left channel and the lower right channel. At this time, the scraper presses against the rear block to open the rear opening, and then the excess slurry is recovered; then the scraper descends to the low end along the upper left channel and the upper right channel. At this time, the scraper pushes the front block to open the front opening, and the slurry overflows from the front opening, and then the scraper pushes the slurry onto the screen; when the scraper moves in a circulation, it cooperates with the opening and closing of the front opening and the rear opening to realize the automatic recovery and automatic feeding effect of the slurry, thereby improving the processing efficiency; therefore, the processing efficiency of the present invention is relatively high. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 yes Figure 1 Schematic diagram of the structure of the printing station.

[0023] Figure 3 yes Figure 2 Schematic diagram of the structure of the middle right panel.

[0024] Figure 4 yes Figure 2 Schematic diagram of the structure of the left side panel.

[0025] Figure 5 yes Figure 2 Cross-sectional view of .

[0026] Figure 6 yes Figure 1 Schematic diagram of the structure of the middle and rear cover.

[0027] Figure 7 yes Figure 1 Schematic diagram of the structure of the middle front cover.

[0028] Figure 8 yes Figure 1 Schematic diagram of the structure of mid- and low-end boards.

[0029] Fig. 9 yes Figure 1 Schematic diagram of the structure of mid-to-high-end boards.

[0030] Fig.10 yes Figure 1 Schematic diagram of the structure of the Chinese wire mesh.

[0031] Fig.11 yes Fig.10 Schematic diagram of the structure of the scraper.

[0032] In the figure: printing table 1, low end 11, front opening 111, low end plate 112, low end hole 113, high end 12, rear opening 121, high end plate 122, high end hole 123, right side plate 13, right screen hole 131, right material hole 132, left side plate 14, left screen hole 141, left material hole 142, recovery bin 15, front connection 16, rear connection 17, screen cavity 18, screen top wall 181, screen upper side wall 182, screen bottom wall 183, screen lower side wall 184, material Material trough 19, material top wall 191, material side wall 192, material bottom wall 193, screen 2, screen hole 21, screen wall 22, scraper 3, left movable shaft 31, right movable shaft 32, left partition 4, upper left channel 41, lower left channel 42, right partition 5, upper right channel 51, lower right channel 52, rear cover plate 6, rear vertical plate 61, rear connecting strip 62, rear blocking block 63, rear spring 64, front cover plate 7, front vertical plate 71, front connecting strip 72, front blocking block 73, front spring 74, printing plate 8. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] See also Figure 1 — Fig.11 , a screen printing device for making a flexible sensor, the device comprising a printing table 1, a screen 2 and a scraper 3; The printing table 1 comprises a low end 11 and a high end 12, wherein the highest height of the high end 12 is higher than the highest height of the low end 11, one side of the high end 12 is connected to one side of the low end 11 via a right side plate 13, a right screen hole 131 and a right material hole 132 are arranged on the right side plate 13 in a direction from the top of the low end 11 to the top of the high end 12, and the right screen hole 131 is located above the right material hole 132; the other side of the high end 12 is connected to the other side of the low end 11 via a left side plate 14, a left screen hole 141 and a left material hole 142 are arranged on the left side plate 14 in a direction from the top of the low end 11 to the top of the high end 12, and the left screen hole 141 is located above the left material hole 142; The left end of the wire mesh 2 is inserted into the left wire mesh hole 141 , the right end of the wire mesh 2 is inserted into the right wire mesh hole 131 , and one end of the wire mesh 2 away from the left material hole 142 and the right material hole 132 is connected to the bottom of the scraper 3 .

[0035] The angle between the left mesh hole 141 and the horizontal line is an acute angle, and the angle between the right mesh hole 131 and the horizontal line is an acute angle.

[0036] The wire mesh 2 includes a plurality of wire mesh holes 21 , and the inner walls of the wire mesh holes 21 are wire mesh walls 22 .

[0037] A mesh cavity 18 is formed between the left mesh hole 141 and the right mesh hole 131. A mesh top wall 181 is disposed on the side of the mesh cavity 18 close to the high end 12, and one end of the mesh top wall 181 is vertically connected to one end of a mesh upper side wall 182. A mesh bottom wall 183 is disposed on the side of the mesh cavity 18 close to the low end 11, and the mesh bottom wall 183 is vertically connected to one end of a mesh lower side wall 184. There is a material groove 19 between the left material hole 142 and the right material hole 132. The material groove 19 includes a material top wall 191, a material side wall 192 and a material bottom wall 193 which are vertically connected in sequence. One end of the material top wall 191 is vertically connected to one end of the upper side wall 182 of the wire mesh, and one end of the material bottom wall 193 is vertically connected to one end of the lower side wall 184 of the wire mesh.

[0038] The lower end 11 is provided with a front opening 111 , and the front cover plate 7 is provided on the front opening 111 . The movement stroke of the front cover plate 7 is moving to be connected with the front opening 111 and moving away from the front opening 111 .

[0039] A low end plate 112 is disposed on the top of the low end 11, and a low end hole 113 is disposed on the low end plate 112; One end of the front cover plate 7 located on the front side of the lower end plate 112 is vertically connected to the front vertical plate 71, and one end of the front connecting strip 72 is vertically connected to the front vertical plate 71. The middle part of the front connecting strip 72 is inserted into the lower end hole 113, and the other end of the front connecting strip 72 extends away from the lower end plate 112.

[0040] A front spring 74 is sleeved on one end of the front connecting strip 72 located between the lower end plate 112 and the front vertical plate 71; One end of the front connecting strip 72 away from the lower end plate 112 is vertically connected to the middle part of the front blocking block 73 .

[0041] The high end 12 is provided with a rear opening 121 , and the rear cover plate 6 is provided on the rear opening 121 . The movement stroke of the rear cover plate 6 is moving to be connected with the rear opening 121 and moving away from the rear opening 121 .

[0042] A high-end plate 122 is disposed on the top of the high-end 12, and a high-end hole 123 is disposed on the high-end plate 122; One end of the rear cover plate 6 located at the rear side of the high-end plate 122 is vertically connected to a rear vertical plate 61, and one end of a rear connecting strip 62 is vertically connected to the rear vertical plate 61. The middle part of the rear connecting strip 62 is inserted into the high-end hole 123, and the other end of the rear connecting strip 62 extends away from the high-end plate 122. One end of the rear connecting strip 62 away from the high end plate 122 is vertically connected to the middle part of the rear blocking block 63; A rear spring 64 is sleeved on one end of the rear connecting strip 62 between the high end plate 122 and the rear vertical plate 61 .

[0043] The scraper 3 includes a left moving shaft 31 and a right moving shaft 32; The left side plate 14 is provided with a left partition plate 4, the upper part of the left partition plate 4 is an upper left channel 41, the lower part of the left partition plate 4 is a lower left channel 42, and the movement stroke of the left movable shaft 31 is to move along the upper left channel 41 and the lower left channel 42; The right side plate 13 is provided with a right partition plate 5 , the upper part of the right partition plate 5 is a right upper channel 51 , the lower part of the right partition plate 5 is a right lower channel 52 , and the movement stroke of the right movable shaft 32 is moving along the right upper channel 51 and the right lower channel 52 .

[0044] The supplementary description of the present invention is as follows: The slurry described in the present invention refers to: a conductive slurry in a paste form, which is screen-printed onto a flexible material and then processed through relevant processes to obtain a conductive film, which is the conductive layer of the flexible sensor.

[0045] Embodiment 1: See also Figure 1 — Fig.11 A screen printing device for making a flexible sensor, the device comprising a printing table 1, a screen 2 and a scraper 3; the printing table 1 comprises a low end 11 and a high end 12, the highest height of the high end 12 is higher than the highest height of the low end 11, one side of the high end 12 is connected to one side of the low end 11 through a right side plate 13, and a right screen hole 131 and a right material hole 132 are arranged on the right side plate 13 in a direction from the top of the low end 11 to the top of the high end 12, the right screen hole 131 is located above the right material hole 132 The other side of the high end 12 is connected to the other side of the low end 11 through the left side plate 14. The left side plate 14 is provided with a left mesh hole 141 and a left material hole 142 in the direction from the top of the low end 11 to the top of the high end 12. The left mesh hole 141 is located above the left material hole 142. The left end of the wire mesh 2 is inserted into the left mesh hole 141, and the right end of the wire mesh 2 is inserted into the right mesh hole 131. The end of the wire mesh 2 away from the left material hole 142 and the right material hole 132 is connected to the bottom of the scraper 3. The angle between the left mesh hole 141 and the horizontal line is an acute angle, and the angle between the right mesh hole 131 and the horizontal line is an acute angle. Preferably, the front connection 16 is an arc structure, and the rear connection 17 is an arc structure.

[0046] When in use, first insert the printing plate 8 into the material slot 19 from the left material hole 142 or the right material hole 132, then place the flexible material on the top of the printing plate 8, then insert the screen 2 into the screen cavity 18 from the left screen hole 141 and the right screen hole 131, then place the slurry on the outside of the scraper 3, then place the scraper 3 on the lower end 11 of the screen 2, and then gradually move the scraper 3 upward along the surface of the screen 2. Because the angle between the left screen hole 141 and the horizontal line is an acute angle, the right screen hole 131 is an acute angle. The angle between the mesh 131 and the horizontal line is an acute angle, so the angle between the screen 2 and the horizontal line is an acute angle, and the screen 2 gradually rises when moving from front to back, so the scraper 3 gradually pushes the slurry upward along the screen 2. At this time, the slurry is tightly accumulated at the bottom of the scraper 3, and the slurry 3 at the bottom falls along the screen 2 to the flexible material under the action of gravity; the front connection 16 and the rear connection 17 are arc structures to provide guidance for the scraper 3 so that the scraper 3 moves smoothly.

[0047] Embodiment 2: The basic content is the same as that of Example 1, except that: See also Figure 1 — Figure 4 The wire mesh 2 includes a plurality of wire mesh holes 21, and the inner wall of the wire mesh hole 21 is a wire mesh wall 22. A wire mesh cavity 18 is provided between the left wire mesh hole 141 and the right wire mesh hole 131. A wire mesh top wall 181 is provided on the side of the wire mesh cavity 18 close to the high end 12, and one end of the wire mesh top wall 181 is vertically connected to one end of the wire mesh upper side wall 182; a wire mesh bottom wall 183 is provided on the side of the wire mesh cavity 18 close to the low end 11, and the wire mesh bottom wall 183 is vertically connected to one end of the wire mesh lower side wall 184; a material slot 19 is provided between the left material hole 142 and the right material hole 132, and the material slot 19 includes a material top wall 191, a material side wall 192 and a material bottom wall 193 that are vertically connected in sequence, one end of the material top wall 191 is vertically connected to one end of the wire mesh upper side wall 182, and one end of the material bottom wall 193 is vertically connected to one end of the wire mesh lower side wall 184.

[0048] When in use, the screen 2 is inserted into the screen cavity 18, at which time, the screen top wall 181 and the screen upper side wall 182 are connected to the top of the screen 2, and the screen bottom wall 183 and the screen lower side wall 184 are connected to the bottom of the screen 2. Because the screen top wall 181 and the screen upper side wall 182 are higher than the screen bottom wall 183 and the screen lower side wall 184, the effect of the top of the screen 2 being higher than the bottom is achieved, and the screen upper side wall 182 and the screen lower side wall 184 are located on the same inclined plane, so the screen 2 is parallel to the inclined plane, and there will be no protrusions or depressions, which is convenient for the scraper 3 to rise along the screen 2; when the scraper 3 rises along the screen 2, the slurry located at the bottom of the scraper 3 falls into the screen hole 21, and the screen wall 22 extends toward the direction of the flexible material, so the screen wall 22 guides the slurry to the flexible material.

[0049] Embodiment 3: The basic content is the same as that of Example 1, except that: See also Figure 1 — Figure 8 , the lower end 11 is provided with a front opening 111, and the front opening 111 is provided with a front cover plate 7, and the movement stroke of the front cover plate 7 is moving to connect with the front opening 111 and moving away from the front opening 111. The top of the lower end 11 is provided with a lower end plate 112, and the lower end plate 112 is provided with a lower end hole 113; the end of the front cover plate 7 located at the front side of the lower end plate 112 is vertically connected to the front vertical plate 71, and the front vertical plate 71 is vertically connected to one end of the front connecting bar 72, the middle part of the front connecting bar 72 is inserted into the low end hole 113, and the other end of the front connecting bar 72 extends away from the lower end plate 112. The front spring 74 is sleeved on the end of the front connecting bar 72 located between the lower end plate 112 and the front vertical plate 71; the end of the front connecting bar 72 away from the lower end plate 112 is vertically connected to the middle part of the front blocking block 73. Preferably, the printing table 1 includes a recovery bin 15.

[0050] When in use, when the scraper 3 is located at the lower end 11, the scraper 3 presses against the front block 73 and moves the front block 73 to the front side of the lower end 11, and then the front block 73 drives the front connecting strip 72 to move forward, and then the front connecting strip 72 drives the front vertical plate 71 and the front cover plate 7 to move forward in sequence. At this time, the front cover plate 7 is away from the front opening 111, and the slurry overflows from the recovery bin 15 along the front opening 111, and the scraper 3 pushes the overflowed slurry to one side of the screen 2, and then the scraper 3 is away from the front block 73, and then the front spring 74 releases the elastic force, and then the front spring 74 pulls the front vertical plate 71 toward the lower end plate 112, and then the front vertical plate 71 drives the front cover plate 7 to move to cover the front opening 111, and the front cover plate 7 seals the front opening 111 to prevent air from contacting the slurry in the recovery bin 15, thereby causing the slurry to fail.

[0051] Embodiment 4: The basic content is the same as that of Example 1, except that: See also Figure 1 — Fig. 9The high end 12 is provided with a rear opening 121, and the rear cover plate 6 is provided on the rear opening 121. The movement stroke of the rear cover plate 6 is moving to connect with the rear opening 121 and moving away from the rear opening 121. The top of the high end 12 is provided with a high end plate 122, and the high end plate 122 is provided with a high end hole 123; the end of the rear cover plate 6 located at the rear side of the high end plate 122 is vertically connected to the rear vertical plate 61, and the rear vertical plate 61 is vertically connected to one end of the rear connecting bar 62, and the middle part of the rear connecting bar 62 is inserted into the high end hole 123, and the other end of the rear connecting bar 62 extends away from the high end plate 122; the end of the rear connecting bar 62 away from the high end plate 122 is vertically connected to the middle part of the rear blocking block 63; the end of the rear connecting bar 62 located between the high end plate 122 and the rear vertical plate 61 is sleeved with a rear spring 64. Preferably, the printing table 1 includes a recovery bin 15.

[0052] During application, when the scraper 3 moves to the high end 12, the two ends of the scraper 3 support the rear block 63 and move the rear block 63 to the rear side of the high end 12, and then the rear block 63 drives the rear connecting strip 62 to move backward, and then the rear connecting strip 62 drives the rear vertical plate 61 and the rear cover plate 6 to move backward in sequence. At this time, the rear cover plate 6 is away from the rear opening 121, and the scraper 3 pushes the excess slurry to the top of the rear opening 121, and then the slurry falls into the rear opening 121, and the slurry enters the recovery bin 15, and then the scraper 3 is away from the rear block 63, and then the rear spring 64 releases the elastic force, and then the spring 64 pulls the rear vertical plate 61 toward the high end plate 122, and then the rear vertical plate 61 drives the rear cover plate 6 to move to cover the rear opening 121, and the rear cover plate 6 seals the rear opening 121 to prevent air from contacting the slurry in the recovery bin 15, thereby causing the slurry to fail.

[0053] Embodiment 5: The basic content is the same as that of Example 1, except that: See also Figure 1 — Fig.11 The scraper 3 includes a left movable shaft 31 and a right movable shaft 32; a left partition plate 4 is arranged on the left side plate 14, an upper left channel 41 is provided above the left partition plate 4, a lower left channel 42 is provided below the left partition plate 4, and the movement stroke of the left movable shaft 31 is along the upper left channel 41 and the lower left channel 42; a right partition plate 5 is arranged on the right side plate 13, an upper right channel 51 is provided above the right partition plate 5, a lower right channel 52 is provided below the right partition plate 5, and the movement stroke of the right movable shaft 32 is along the upper right channel 51 and the lower right channel 52.

[0054] When in use, the left moving shaft 31 of the scraper 3 moves upward along the lower left channel 42, and the right moving shaft 32 of the scraper 3 moves upward along the lower right channel 52, so that the scraper 3 can move upward along the screen 2; when the scraper 3 moves to the high end 12, the left moving shaft 31 and the right moving shaft 32 support the rear block 63 to achieve an automatic recovery effect; then the left moving shaft 31 and the right moving shaft 32 leave the rear block 63, and the left moving shaft 31 and the right moving shaft 32 move downward along the upper left channel 41 and the upper right channel 51 again, and when the scraper 3 moves to the low end 11, the left moving shaft 31 and the right moving shaft 32 support the front block 73 to achieve an automatic recovery effect.

[0055] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed by the present invention should be included in the protection scope recorded in the claims.

Claims

1. A screen printing device for making a flexible sensor, characterized in that: The device comprises a printing table (1), a screen (2) and a scraper (3); The printing table (1) comprises a lower end (11) and a higher end (12), the highest height of the higher end (12) being higher than the highest height of the lower end (11), one side of the higher end (12) being connected to one side of the lower end (11) via a right side plate (13), a right screen hole (131) and a right material hole (132) being arranged on the right side plate (13) in a direction from the top of the lower end (11) to the top of the higher end (12), the right screen hole (131) being located above the right material hole (132); the other side of the higher end (12) being connected to the other side of the lower end (11) via a left side plate (14), a left screen hole (141) and a left material hole (142) being arranged on the left side plate (14) in a direction from the top of the lower end (11) to the top of the higher end (12), the left screen hole (141) being located above the left material hole (142); The left end of the wire mesh (2) is inserted into the left wire mesh hole (141), the right end of the wire mesh (2) is inserted into the right wire mesh hole (131), and one end of the wire mesh (2) away from the left material hole (142) and the right material hole (132) is connected to the bottom of the scraper (3).

2. The screen printing device for making a flexible sensor according to claim 1, characterized in that: The angle between the left wire mesh hole (141) and the horizontal line is an acute angle, and the angle between the right wire mesh hole (131) and the horizontal line is an acute angle.

3. A screen printing device for making a flexible sensor according to claim 1 or 2, characterized in that: The wire mesh (2) comprises a plurality of wire mesh holes (21), and the inner walls of the wire mesh holes (21) are wire mesh walls (22).

4. The screen printing device for making a flexible sensor according to claim 3, characterized in that: A wire mesh cavity (18) is provided between the left wire mesh hole (141) and the right wire mesh hole (131); a wire mesh top wall (181) is provided on a side of the wire mesh cavity (18) close to the high end (12); one end of the wire mesh top wall (181) is vertically connected to one end of an upper wire mesh side wall (182); a wire mesh bottom wall (183) is provided on a side of the wire mesh cavity (18) close to the low end (11); the wire mesh bottom wall (183) is vertically connected to one end of a lower wire mesh side wall (184); A material slot (19) is provided between the left material hole (142) and the right material hole (132). The material slot (19) comprises a material top wall (191), a material side wall (192) and a material bottom wall (193) which are vertically connected in sequence. One end of the material top wall (191) is vertically connected to one end of the upper side wall (182) of the wire mesh, and one end of the material bottom wall (193) is vertically connected to one end of the lower side wall (184) of the wire mesh.

5. A screen printing device for making a flexible sensor according to claim 1 or 2, characterized in that: The lower end (11) is provided with a front opening (111), and the front opening (111) is provided with a front cover plate (7), and the movement stroke of the front cover plate (7) is to move to connect with the front opening (111) and to move away from the front opening (111).

6. The screen printing device for manufacturing a flexible sensor according to claim 5, characterized in that: A lower end plate (112) is provided at the top of the lower end (11), and a lower end hole (113) is provided on the lower end plate (112); One end of the front cover plate (7) located on the front side of the lower end plate (112) is vertically connected to a front vertical plate (71), one end of a front connecting strip (72) is vertically connected to the front vertical plate (71), the middle portion of the front connecting strip (72) is inserted into the lower end hole (113), and the other end of the front connecting strip (72) extends in a direction away from the lower end plate (112).

7. The screen printing device for manufacturing a flexible sensor according to claim 6, characterized in that: A front spring (74) is sleeved on one end of the front connecting strip (72) located between the lower end plate (112) and the front vertical plate (71); One end of the front connecting strip (72) away from the lower end plate (112) is vertically connected to the middle part of the front blocking block (73).

8. A screen printing device for making a flexible sensor according to claim 1 or 2, characterized in that: The high end (12) is provided with a rear opening (121), and the rear opening (121) is provided with a rear cover plate (6), and the movement stroke of the rear cover plate (6) is moving to connect with the rear opening (121) and moving away from the rear opening (121).

9. The screen printing device for manufacturing a flexible sensor according to claim 8, characterized in that: A high-end plate (122) is provided on the top of the high end (12), and a high-end hole (123) is provided on the high-end plate (122); One end of the rear cover plate (6) located on the rear side of the high-end plate (122) is vertically connected to a rear vertical plate (61), one end of a rear connecting strip (62) is vertically connected to the rear vertical plate (61), the middle portion of the rear connecting strip (62) is inserted into the high-end hole (123), and the other end of the rear connecting strip (62) extends in a direction away from the high-end plate (122); One end of the rear connecting strip (62) away from the high end plate (122) is vertically connected to the middle part of the rear blocking block (63); A rear spring (64) is sleeved on one end of the rear connecting strip (62) located between the high end plate (122) and the rear vertical plate (61).

10. A screen printing device for manufacturing a flexible sensor according to claim 1 or 2, characterized in that: The scraper (3) comprises a left movable shaft (31) and a right movable shaft (32); A left partition (4) is provided on the left side plate (14); an upper left channel (41) is located above the left partition (4); a lower left channel (42) is located below the left partition (4); and a movement stroke of the left movable shaft (31) is along the upper left channel (41) and the lower left channel (42); A right partition (5) is arranged on the right side plate (13); an upper right channel (51) is located above the right partition (5); a lower right channel (52) is located below the right partition (5); and a movement stroke of the right movable shaft (32) is along the upper right channel (51) and the lower right channel (52).

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